you need to eat 5-6 times a day, small meals.
dont eat 3 hours before your bedtime, and try to stick to protein. carbs are ok in small amounts especailly if you doing cardio, your body will gobble the carbs up and start burning fat.
get a heart rate monitor and find out what your burning zone is, stay in the zone aslong as you can while doing your cardio.
dont under-eat, too little calories and your body will go into starvation mode
if your serious about getting inshape and are willing to dedicate 90 days of healthy eating and around an hours excercise a day, i suggest you look at either p90x or Insanity workout